Brace mechanism for type-writer shift-frames.



' lT. LKNAPP.. BRACB MEGHANISM FOR TYPE WRITER SHIFT FRAMES.-

Pa'oented Feb. '7, 1911.

APPLICATION FILED JUNE 27, 1910.'

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T.L.KNAPP.' BRASS MBGHANI-SM'EOR TYPE WRITER SHIFT FRAMES;I

APPLICATION FILBDJUNE 27', 1910.

'I Patent@ Feb. 7, 1911.

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UNITED srnrns PATENT ermee.

THERON L. KNAPP, 0F WOODSTOCK, ILLINOIS, ASSIGNOR TO '.LHE OLIVER TYPEWRITER COMPANY! OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BRACE MECHANISM FOR TYPE-WRITER SHIFT-FRAMES.

Specification of Letters Patent.

`Patented Feb. 7, 1911.

Application led June 27, 1910. Serial No. 569,133.

To all. whom 'it may concern:

Be it known that I, THnRorL. KNAPP, a

drawings, and to the letters of reference' marked thereon, which form a part of this specification.

This invention. relates to a typewritingA machine shift-frame upon which the carriage is supported aand has endwisemovement, and which itself has backward and forward shifting movement upon the machine frame in order. to bring the platen and the paper" thereon into position to receive impressions from a plurality of types fao carried by each ofthe Atype-bars of the ina-- chine.

The invention is more particularly applicable 'to machines f the Oliver type, in which the shift-frame is provided with two horizontal, transversely arranged `guidebars, on 'which the paper-carriage rests and travels, and in which said guide-bars project at their ends beyond the shift-frame j V proper and extend'latcrallyl outside of the vframe of the machine and arc made of sufficient lengthr'toproperly support the car-l riage, Whatever unay be the length of the latter..` f

The object of the inventing; is to provide means adapted to maintain the. guide-bars in proper, parallel alinement' in machines in'which vthe length of the guide-bars is such, as in the 'case of-ex-tra long carriages used for very Wille 'pa-per, that the guide'- ,`bars cannot wellii be made suliieicntly stiff hereinafter described and lmore or rigid in themselves to retain them in proper relation throughout their length.

The' invention consists of the mat-ters particularly pointed out in the appended claims.

, -The invention is shown 1n the accompany! ing drawings in connection with a' typewriting machine ofthe 'Oliver type made in accordanceA with United States Letters Patent Number 559,863, granted to Thomas Oliver March-1st, `1898, and United States Letters Patent Number: 904,207, granted A November 17th, 1908, to Theron'L. Knapp.

vrear of the base frame 1 and 'wide sheet of paper.

by means of which the shaft-frame'is supported at its forward end. Fig. Q. is a artial vertical section through Fig. l on t ic line 2?-2 thereof. Fig. 3 is a' partial vertical section through Fig. l on the line 3-3 there-` of. Fig. 4 is a partial vertical section through Fig. l on the line L`4 thereof.

being shown 41n section .as are also the swinging-links or arms Fig. 5 is a detail perspectiveview of one ot' -the connecting parts to be referred to later.

The views shown in Figs. 2 to 5 are all on an enlarged scale.

As shown in said drawings, lindicates the base-plate of the typewriting machine; `2,.'.he

shift-frame, which is 'supported on the base so as to have backward and forward shifting movemenJ thereon, and is provided with forward and yrear, horizontal, transversely extending guide-bars 3 and 4 on which rest and, travel the supporting pulleys of the paper-carriage (not shown in the drawings).

Said shift-frame`2 is supported at its for ward end by means of swinging arms 2, 2 (shown in cross-section in Fig. l?, and at its rear end by means of ahorizonta guide-stem 2"`rigidly attached to ytheshiiit-:t'rame and passing through a guide standard-1a ontne resting upon a guide roller l" able distance beyondor outside of the basel mounted in said standard. The guide-bars 3, 4 are extended a considerj .9.5,

plate l at both sides of the 'machinein order.

to properly support a siderable length adapted to'ireceiv'e a very The ends of said` uidebars aressupported from a horizontal y arranged base-board .5, upon Which-the base l .is centrally disposed, by means of-ixed members 6 secured to the lat-ing supportin arms 7 resting' on said fixed members. lachoscillatin arm' 7 has pivotal connection withits associated guidear so as to swing-transversely of the shiftbase-board and oseil- Aframe, and bearing -engagementwith its fixed, member by; means of horizontally separated set-screws 7"', 7, so as to afford rispapercarriage of-coning and falling movement of the end of the 1de bar to correspondvvith .the-rising and allinfr movement ofthe forward end of the hit rame. 8,-v 8 are brace-rods secured by means ofayoke 9'Ato the rear of the guide barSZb. Said brace-rods diverge4 toward; the

front of the machine and are rigidly connected to theffront guidebar near its ends. "The parts thus far described are substantially as shown in the patent above referred to, No; 904,207, and require no further description.

"The front guide-bar 3. is longer than the rearguidelbar 4 and projects beyond said rear guide-bar at both ends. It is connected to the ends of said rear guide-bar by means of parallel, longitudinal y extending braces 10, 10 (see Figs. 1 and 3). Said braces comprise horizontal members 1Ga and upwardly 12 is a rockhaft arranged parallel to the' guide-bars 3, 4, and rotatably mountedon the base-board 1 near its rear margin by means of bearing lugs 12a rigidly secured to said-board. '13, 14, 13 are upwardly projecting rock-arms which are made rigid with said rock-shaft and project upward to points substantially on a level'with the sliift-frame- The rock-arm 14 is arranged to swing in the vertical plane through the guide-rod 2b and the rock-arms 13, 13 are arranged to swing in the vertical planes of movement of the ends of the guidefrod 3 during the shift of the shift-frame. j'The rock-arms 13, 13 are connected by means of links 15, 15 to the ends'of the guide-rods 3. `Each of said links 15 comprises a short horizontal member 15a which is located on a level with the horizontal members 10 of the braces 10; a rear wardly inclined extension 1.5 winch ispivotally connected to its associated rock arm 1S;

and a rearwardly and upwardly inclined 11pright member 15 at its forward end which is pivotally connected to the guide-bar The upright member 15c is pivoted to the end of said guide-bar 8 by the saine screw 16 by means of which the oscillating member of the end support of said guideliar is pivoted1 thereto. The rear end of the link 15 is pivntally connected to the upright rock-arm 15 by means of a bolt 13a.

The middle upright rock-arm 14 is connected at its upper end to the yoke 9 toL t which are secured the brace bars 8,

Said

yoke is provided with 'laterally separated .upright ears-9, 9 (see Fig. '5) between y which-is pivoted the forward end of a short link14a, the rear end of which is pivot-ally connected to the upper end of said rock arm.,

By'means of the construction described, the guide-bars are connected together near their ends by the braces 10 which hold them in spaced relation at these points and, in addition, the front guide-bar is connected by the links 15, 15 Vto the swinging frame coniprisingthejrockshaft 12 and" the upright rock-arms 13, 13, 14, which also has connection with the shift-frame at `its middle through the link 14 connecting tlie'yoke 9 with the rock-arm 14. We thus have the' guide-bars not only held in parallel relation by means of connections between them but 'also have them held in properaline arrangement by means .of then' connection'to -the swinging frame -at or near their ends and at the mid le.l y

By providing the braces 10, 10 and 15, 15

with uprightvmembers for connecting them` to the gi-iide-bars, said links are located below the paper-carriage a sufiicient distance so that they will not interfere with its operation. y

I claim as my invention 2*- 1. The combination with a typewriting machine frame, a base-board beneath said` xframe, a shift-frame having shifting movement on the machine frame, said shift-frame 4being provided with laterally extending guide-bars which project beyond thema-- chine frame, and means for supporting the A ends of said guidebars, of braces connecting said guide-bars near their ends, a-rocking frame supported `on said baseboard, 'and links connecting one of said guide-bars to said locking frame.

2. The combinati on 'with aVA typewriting machine frame, a base-board beneath said Aframe, a shift-framehaving shifting movement on the machine frame, said shift-frame being provided with laterally extending guidebars which project beyond the machine frame, and means for supporting the ends of said guide-bars, ofbracesconnecting said guide-bars near their ends, a rocking frame embracing a rock shaft rotatably mounted on said base-board and extending parallel to said guide-bars, and upright rockarms made rigid with said rock-shafts, and links connecting one of said guide-bars to said rock-arms.'` V l 3, The combination with a typewriting machine frame, a base-board beneath said frame, a shift-frame having shifting moveincnt on the machine frame, said Shift-frame being provided with laterally extending guide-liars which lproject beyond the meltending parallel to said guide-bars and. lo-v to hold them in proper spac'ed relation, a rocking frame embracing a rock shaft excated near the rear Amargin of said 'baseboard, and upright rock-arms made rigid with the said rock-shaft and adapted to swing in planes parallel to the longitudinal central axisof the machine frame, one of said rockarms being located in the plane of the central longitudinal axis ofthe machine, and a rockarm located opposite each end of one of said guide-bars, links connecting the ends of saidguide-bar with their associated rocka'rms, and= a link connecting the intermediate rock-arm with the shift-frame.

'1. The combination with a typewriting machine frame, a base-board beneath said frame, a shift-frame having shifting movement-on the machine frame,'said shift-frame being provided with laterallyl extending guide-bars which project beyond the ma- `chine frame, means for supportin the ends of said .guide-bars, and a rearward y extendving guide stem made rigid with said shiftframe, of bracesv connecting said guide-bars near their ends, a rocking frame comprising a shaft parallel witlrrs'aid guide-bars and rotatably 4mounted on `,said 'base-board, and upright 'rock-arms maderigid` with said shaft, one of said rock-arms being located.

opposite the end of said guide-stem, a lug secured to the end of said guide-stem, a link pivotally connected at one end to said lug and at the other end to saidl rock-arm, two of sai-d'roclcarms being located opposite the ends of one of said guide-bars, and links pivotally connected at one end to the end o saiUg'nide-bar and at the opposite, end .to

tlielassnciatcdrock-arm.

5". The combination with a typewriting .machine frame, a base-board beneath said lframe, a shift-frame havlng shifting movement on the machine frame, said 'shift-frame being provided with a laterally extending guide-bar which projects beyond the machine rame, and means for supporting the and adapted to swing in planes parallel to the .longithdinal central axis of the machine frame7 one of said. rock arms being located in the plane of the central longitudinal axis of the machine, and a rock-arm located opposite 'each' end of said guide-bar, links connecting theends of said guide-'bar with their 'associated rock-arms, and a link connecting the intermediate rock-arm with the shiftframe.

In testimony that I claim the foregoing as my invention I affix my signature in the presence of two Witnesses, this 17th day of June A. D. 1910.

'rHERoNL KNAPP.

Vitnesses: A. J. MULLEN,

LILLIAN Scnaonnnn.

' arms made rigid with the saidrock-shaft 

